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晶格氧气交换途径在-铁金属-有机框架-基于氧气进化电催化剂

Daniel J Zheng¹, Kaylee McCormack², Jiayu Peng¹

¹Department of Materials Science and Engineering, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, United States.

ACS applied materials & interfaces

|December 29, 2025

概括

金属氧化物有机框架 (MHOFs) 对电燃料生产具有前景. 网格氧气交换与氧气演变反应活性有负相关性,链接器稳定性影响了汇率.

科学领域:

材料科学材料科学材料科学
电化学电化学电化学
催化剂是一种催化剂.

背景情况:

氧气演化反应 (OER) 对于电燃料生产至关重要.
金属氧化物有机框架 (MHOFs) 是有前途的OER电催化剂.
了解格子氧气交换是优化MHOF性能的关键.

研究的目的:

研究Ni和Fe替代的MHOF中的晶格氧气交换.
与OER活动相关联的格子氧气交换.
阐明在MHOF中晶格氧气交换的机制.

主要方法:

¹⁸O同位素标记的标签
在操作中,拉曼光谱法.
在操作中,X射线光谱学 (XAS) 和紫外线视觉.
密度函数理论 (DFT) 的计算.

主要成果:

格子氧气交换和OER活动之间存在负相关性.
铁的替代和更高的链接器稳定性抑制了晶格氧气交换.
网格氧气交换发生在减少的Ni2+位点上,并受到拉曼激光的影响.

结论:

MHOF表面转化为具有OER活性的MO_xH_y等相.
网格氧气交换通路与催化OER机制是不同的.
对MHOF晶格氧气交换机制的洞察力为催化剂设计提供.

关键词:

同位素标签的标签网格氧气交换系统中的氧气交换系统金属-有机的框架.操作的光谱学.氧气进化反应反应氧气进化反应

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Catalysis

Catalysis

The presence of a catalyst affects the rate of a chemical reaction. A catalyst is a substance that can increase the reaction rate without being consumed during the process. A basic comprehension of a catalysts’ role during chemical reactions can be understood from the concept of reaction mechanisms and energy diagrams.